qemu/include/sysemu/numa.h
Igor Mammedov 57924bcd87 numa: introduce machine callback for VCPU to node mapping
Current default round-robin way of distributing VCPUs among
NUMA nodes might be wrong in case on multi-core/threads
CPUs. Making guests confused wrt topology where cores from
the same socket are on different nodes.

Allow a machine to override default mapping by providing
 MachineClass::cpu_index_to_socket_id()
callback which would allow it group VCPUs from a socket
on the same NUMA node.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2015-03-19 16:12:09 -03:00

26 lines
625 B
C

#ifndef SYSEMU_NUMA_H
#define SYSEMU_NUMA_H
#include <stdint.h>
#include "qemu/bitmap.h"
#include "qemu/option.h"
#include "sysemu/sysemu.h"
#include "sysemu/hostmem.h"
#include "hw/boards.h"
extern int nb_numa_nodes; /* Number of NUMA nodes */
typedef struct node_info {
uint64_t node_mem;
DECLARE_BITMAP(node_cpu, MAX_CPUMASK_BITS);
struct HostMemoryBackend *node_memdev;
bool present;
} NodeInfo;
extern NodeInfo numa_info[MAX_NODES];
void parse_numa_opts(MachineClass *mc);
void numa_post_machine_init(void);
void query_numa_node_mem(uint64_t node_mem[]);
extern QemuOptsList qemu_numa_opts;
#endif